A

A

A

A

A

A

A

-XT-1W

-XT-1W

-XT-1W

-XT-1W

-XT-1W

-XT-1W

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 3 of 6

Application

Application

Application

Application

Application

Application

Application

Notes

Notes

Notes

Notes

Notes

Notes

Notes

Minimum

Minimum

Minimum

Minimum load

load

load

load

The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in an

increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.

Capacitive

Capacitive

Capacitive

Capacitive loading

loading

loading

loading and

and

and

and start

start

start

start up

up

up

up

Typical start up times for this series, with a typical input voltage rise time of 2.2μs and output capacitance of 10μF, are shown in the table below. The product series will start

into a capacitance of 47μF with an increased start time, however, the maximum recommended output capacitance is 10μF.

Start-up time

Start-up time

μs

μs

A0303XT

1630

A0509XT

6850

A0305XT

1359

A0512XT

11560

A0309XT

3435

A0515XT

15640

A0312XT

6590

A1205XT

1154

A0315XT

25340

A1209XT

4050

A0503XT

1599

A1212XT

7995

A0505XT

2185

A1215XT

11200

A0305NXT

1395

Ripple

Ripple

Ripple

Ripple &

&

&

& Noise

Noise

Noise

Noise Characterisation

Characterisation

Characterisation

Characterisation Method

Method

Method

Method

Ripple and noise measurements are performed with the following test configuration.

C1

1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter

C2

10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less

than 100mΩ at 100 kHz

C3

100nF multilayer ceramic capacitor, general purpose

R1

450Ω resistor, carbon fi lm, ±1% tolerance

R2

50Ω BNC termination

T1

3T of the coax cable through a ferrite toroid

RLOAD

Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires

Measured values are multiplied by 10 to obtain the specified values.

Differential

Differential

Differential

Differential Mode

Mode

Mode

Mode Noise

Noise

Noise

Noise Test

Test

Test

Test Schematic

Schematic

Schematic

Schematic